The driver may sleep under a spin lock, and the function call path is:
mraid_mm_attach_buf (acquire the lock by spin_lock_irqsave)
  pci_pool_alloc(GFP_KERNEL) --> may sleep

To fix it, the "GFP_KERNEL" is replaced with "GFP_ATOMIC".

Signed-off-by: Jia-Ju Bai <baijiaju1...@163.com>
---
 drivers/scsi/megaraid/megaraid_mm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/megaraid/megaraid_mm.c 
b/drivers/scsi/megaraid/megaraid_mm.c
index 4cf9ed9..c43afb8 100644
--- a/drivers/scsi/megaraid/megaraid_mm.c
+++ b/drivers/scsi/megaraid/megaraid_mm.c
@@ -574,7 +574,7 @@
 
        kioc->pool_index        = right_pool;
        kioc->free_buf          = 1;
-       kioc->buf_vaddr         = pci_pool_alloc(pool->handle, GFP_KERNEL,
+       kioc->buf_vaddr         = pci_pool_alloc(pool->handle, GFP_ATOMIC,
                                                        &kioc->buf_paddr);
        spin_unlock_irqrestore(&pool->lock, flags);
 
-- 
1.7.9.5


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